platform/upstream/gcc.git
4 years agore PR middle-end/90840 (ICE in simplify_subreg, at simplify-rtx.c:6441)
Jakub Jelinek [Wed, 20 Nov 2019 08:32:56 +0000 (09:32 +0100)]
re PR middle-end/90840 (ICE in simplify_subreg, at simplify-rtx.c:6441)

PR middle-end/90840
* expmed.c (store_bit_field_1): Handle the case where op0 is not a MEM
and has a mode that doesn't have corresponding integral type.

* gcc.c-torture/compile/pr90840.c: New test.

From-SVN: r278483

4 years agore PR target/90867 (Multiplication or typecast of integer and double always zero...
Jakub Jelinek [Wed, 20 Nov 2019 08:31:43 +0000 (09:31 +0100)]
re PR target/90867 (Multiplication or typecast of integer and double always zero when...)

PR target/90867
* config/i386/i386-options.c (ix86_valid_target_attribute_tree): Don't
clear opts->x_ix86_isa_flags{,2} here...
(ix86_valid_target_attribute_inner_p): ... but here when seeing
arch=.  Also clear opts->x_ix86_isa_flags{,2}_explicit.

* gcc.target/i386/pr90867.c: New test.

From-SVN: r278482

4 years agore PR c/90898 (ICE in insert_clobber_before_stack_restore, at tree-ssa-ccp.c:2112)
Jakub Jelinek [Wed, 20 Nov 2019 08:29:35 +0000 (09:29 +0100)]
re PR c/90898 (ICE in insert_clobber_before_stack_restore, at tree-ssa-ccp.c:2112)

PR c/90898
* tree-ssa-ccp.c (insert_clobber_before_stack_restore): Remove
assertion.
(insert_clobbers_for_var): Fix a typo in function comment.

* gcc.dg/pr90898.c: New test.

From-SVN: r278481

4 years agore PR middle-end/91195 (incorrect may be used uninitialized smw (272711, 273474])
Jakub Jelinek [Wed, 20 Nov 2019 08:26:52 +0000 (09:26 +0100)]
re PR middle-end/91195 (incorrect may be used uninitialized smw (272711, 273474])

PR middle-end/91195
* tree-ssa-phiopt.c (cond_store_replacement): Move lhs unsharing
earlier.  Set TREE_NO_WARNING on the rhs1 of the artificially added
load.

* gcc.dg/pr91195.c: New test.

From-SVN: r278479

4 years agoMake 0-series device specs work with older versions of avr-gcc.
Georg-Johann Lay [Wed, 20 Nov 2019 08:19:44 +0000 (08:19 +0000)]
Make 0-series device specs work with older versions of avr-gcc.

PR target/92545
* config/avr/specs.h (LINK_SPEC) <%(link_pm_base_address)>: Remove.
* config/avr/gen-avr-mmcu-specs.c (print_mcu)
<*link_pm_base_address>: Don't write spec.
<*link_arch>: Add --defsym=__RODATA_PM_OFFSET__= as needed.

From-SVN: r278478

4 years agore PR c/92088 (aggregates with VLAs and nested functions are broken)
Richard Biener [Wed, 20 Nov 2019 07:33:19 +0000 (07:33 +0000)]
re PR c/92088 (aggregates with VLAs and nested functions are broken)

2019-11-20  Richard Biener  <rguenther@suse.de>

PR c/92088
c/
* c-decl.c (grokdeclarator): Prevent inlining of nested
function with VLA arguments.

* builtins.c (compute_objsize): Deal with VLAs.

* gcc.dg/torture/pr92088-1.c: New testcase.
* gcc.dg/torture/pr92088-2.c: Likewise.

From-SVN: r278477

4 years agocvt.c (ocp_convert): Use additional warning sentinel.
Paolo Carlini [Wed, 20 Nov 2019 01:02:46 +0000 (01:02 +0000)]
cvt.c (ocp_convert): Use additional warning sentinel.

/cp
2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

* cvt.c (ocp_convert): Use additional warning sentinel.

/testsuite
2019-11-20  Paolo Carlini  <paolo.carlini@oracle.com>

* g++.dg/warn/multiple-sign-compare-warn-1.C: New.

From-SVN: r278475

4 years agoDaily bump.
GCC Administrator [Wed, 20 Nov 2019 00:16:19 +0000 (00:16 +0000)]
Daily bump.

From-SVN: r278474

4 years agoAdd more pedwarns for [[]] C attributes on types.
Joseph Myers [Wed, 20 Nov 2019 00:13:51 +0000 (00:13 +0000)]
Add more pedwarns for [[]] C attributes on types.

The standard [[]] attributes currently defined in C2x are all not
valid on types not being defined at the time.

Use on such types results in a warning from attribs.c about attributes
appertaining to types (the warning that I think is bogus in general
for both C and C++, applying as it does to all [[]] attributes
including gnu:: ones that are perfectly meaningful on types not being
defined and work fine when __attribute__ syntax is used instead).  If
that warning is removed (as I intend to do in a subsequent patch),
warnings may or may not result from the attribute handlers, depending
on whether those particular attribute handlers consider the attributes
meaningful in such a context.  In C, however, the rules about where
each [[]] attribute is valid are constraints, so a pedwarn, not a
warning, is required.

Because some handlers are shared between standard and gnu::
attributes, there can be cases that are valid for the GNU attribute
variant but not for the standard one.  So in general it is not correct
to rely on the attribute handlers to give all required pedwarns
(although in some cases, a pedwarn in the attribute handler is in
appropriate way of diagnosing an invalid use); they not have the
information about whether the attribute was a gnu:: one and can
legitimately accept a wider range of uses for the gnu:: attributes.

This patch ensures appropriate diagnostics for invalid uses of C2x
standard attributes on types, and so helps pave the way for the
subsequent removal of the bogus check in attribs.c, by adding a check
run in the front end before calling decl_attributes; this check
removes the attributes from the list after calling pedwarn to avoid
subsequent duplicate warnings.

Bootstrapped with no regressions for x86_64-pc-linux-gnu.

gcc/c:
* c-decl.c (c_warn_type_attributes): New function.
(groktypename, grokdeclarator, finish_declspecs): Call
c_warn_type_attributes before applying attributes to types.
* c-tree.h (c_warn_type_attributes): Declare.

gcc/testsuite:
* gcc.dg/c2x-attr-deprecated-2.c, gcc.dg/c2x-attr-fallthrough-2.c,
gcc.dg/c2x-attr-maybe_unused-2.c: Expect errors for invalid uses
of standard attributes on types.  Add more tests of invalid uses
on types.

From-SVN: r278471

4 years agolibgo: better cmd/cgo handling for '.' in pkgpath
Ian Lance Taylor [Tue, 19 Nov 2019 23:04:08 +0000 (23:04 +0000)]
libgo: better cmd/cgo handling for '.' in pkgpath

    Updates cgo's gccgoPkgpathToSymbolNew() to bring it into
    conformance with the way that gccgo now handles package
    paths with embedded dots (see CL 200838). See also
    https://gcc.gnu.org/PR61880, a related bug. This CL is a
    copy of CL 207957 in the main Go repo.

    Updates golang/go#35623.

    Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/207977

From-SVN: r278470

4 years agore PR c++/92414 (internal compiler error: tree check: expected constructor, have...
Jakub Jelinek [Tue, 19 Nov 2019 21:28:22 +0000 (22:28 +0100)]
re PR c++/92414 (internal compiler error: tree check: expected constructor, have error_mark in cxx_eval_store_expression, at cp/constexpr.c:4009)

PR c++/92414
* constexpr.c (cxx_eval_outermost_constant_expr): If DECL_INITIAL
on object is erroneous, return t without trying to evaluate
a constexpr dtor.

* g++.dg/cpp2a/constexpr-dtor4.C: New test.

From-SVN: r278468

4 years agoConsider parm types equivalence for operator rewrite tiebreaker.
Jason Merrill [Tue, 19 Nov 2019 20:22:12 +0000 (15:22 -0500)]
Consider parm types equivalence for operator rewrite tiebreaker.

The C++ committee continues to discuss how best to avoid breaking existing
code with the new rules for reversed operators.  A recent suggestion was to
base the tie-breaker on the parameter types of the candidates, which made a
lot of sense to me, so this patch implements that.

This patch also mentions that a candidate was reversed or rewritten when
printing the list of candidates, and warns about a comparison that becomes
recursive under the new rules.  There is no flag for this warning; people
can silence it by swapping the operands.

* call.c (same_fn_or_template): Change to cand_parms_match.
(joust): Adjust.
(print_z_candidate): Mark rewritten/reversed candidates.
(build_new_op_1): Warn about recursive call with reversed arguments.

From-SVN: r278465

4 years agors6000.c (move_to_end_of_ready): New, factored out from common code.
Pat Haugen [Tue, 19 Nov 2019 19:49:37 +0000 (19:49 +0000)]
rs6000.c (move_to_end_of_ready): New, factored out from common code.

* config/rs6000/rs6000.c (move_to_end_of_ready): New, factored out
from common code.
(power6_sched_reorder2): Factored out from rs6000_sched_reorder2,
call new function.
(power9_sched_reorder2): Call new function.
(rs6000_sched_reorder2): Likewise.

From-SVN: r278463

4 years agoMove ChangeLog entry to correct file
Richard Sandiford [Tue, 19 Nov 2019 18:58:44 +0000 (18:58 +0000)]
Move ChangeLog entry to correct file

From-SVN: r278461

4 years agoRemove unused parameter PROB in ipa-fnsummary.c
Jan Hubicka [Tue, 19 Nov 2019 18:57:50 +0000 (19:57 +0100)]
Remove unused parameter PROB in ipa-fnsummary.c

        * ipa-fnsummary.c (estimate_edge_size_and_time): Drop parameter PROB.
(estimate_calls_size_and_time): Update.

From-SVN: r278460

4 years agoAvoid redundant computations in edge_badness.
Jan Hubicka [Tue, 19 Nov 2019 18:56:26 +0000 (19:56 +0100)]
Avoid redundant computations in edge_badness.

        * ipa-inline.c (inlining_speedup): New function.
(edge_badness): Use it.

From-SVN: r278459

4 years ago[MIPS] Prevent MSA branches from being put into delay slots
Dragan Mladjenovic [Tue, 19 Nov 2019 18:14:32 +0000 (18:14 +0000)]
[MIPS] Prevent MSA branches from being put into delay slots

 This patch tightens the instruction definitions to make sure
 that MSA branch instructions cannot be put into delay slots and have their
 delay slots eligible for being filled. Also, MSA *div*3 patterns use MSA
 branches for zero checks but are not marked as being multi instruction and
 thus could be put into delay slots. This patch fixes that.

gcc/ChangeLog:

2019-11-19  Zoran Jovanovic <zoran.jovanovic@mips.com>
Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

* config/mips/mips-msa.md (msa_<msabr>_<msafmt_f>, msa_<msabr>_v_<msafmt_f>):
Mark as not having "likely" version.
* config/mips/mips.md (insn_count): The simd_div instruction with
TARGET_CHECK_ZERO_DIV consists of 3 instructions.
(can_delay): Exclude simd_branch.
(defile_delay *): Add simd_branch instructions.
They have one regular delay slot.

gcc/testsuite/ChangeLog:

2019-11-19  Dragan Mladjenovic  <dmladjenovic@wavecomp.com>

* gcc.target/mips/msa-ds.c: New test.

From-SVN: r278458

4 years agoRevert r278441
Richard Sandiford [Tue, 19 Nov 2019 16:31:17 +0000 (16:31 +0000)]
Revert r278441

To restore powerpc bootstrap.

2019-11-19  Richard Sandiford  <richard.sandiford@arm.com>
gcc/
Revert:
2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

* cse.c (cse_insn): Delete no-op register moves too.
* simplify-rtx.c (comparison_to_mask): Handle unsigned comparisons.
Take a second comparison to control the value for NE.
(mask_to_comparison): Handle unsigned comparisons.
(simplify_logical_relational_operation): Likewise.  Update call
to comparison_to_mask.  Handle AND if !HONOR_NANs.
(simplify_binary_operation_1): Call the above for AND too.

gcc/testsuite/
Revert:
2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

* gcc.target/aarch64/sve/acle/asm/ptest_pmore.c: New test.

From-SVN: r278455

4 years ago[AArch64] PR79262: Adjust vector cost
Wilco Dijkstra [Tue, 19 Nov 2019 15:57:54 +0000 (15:57 +0000)]
[AArch64] PR79262: Adjust vector cost

PR79262 has been fixed for almost all AArch64 cpus, however the example is still
vectorized in a few cases, resulting in lower performance.  Adjust the vector
cost slightly so that so that -mcpu=cortex-a53 now has identical performance as
-mcpu=cortex-a57 on libquantum.

    gcc/
PR target/79262
* config/aarch64/aarch64.c (generic_vector_cost): Adjust
vec_to_scalar_cost.

From-SVN: r278452

4 years agore PR c++/89913 (ICE with invalid using declaration)
Andrew Sutton [Tue, 19 Nov 2019 15:26:16 +0000 (15:26 +0000)]
re PR c++/89913 (ICE with invalid using declaration)

PR c++/89913

gcc/cp/
* pt.c (get_underlying_template): Exit loop if the original type
of the alias is null.

gcc/testsuite/
* g++.dg/cpp2a/pr89913.C: New test.

From-SVN: r278451

4 years agore PR c++/92078 (error: 'struct std::ptr<Iter>' redeclared with different access)
Andrew Sutton [Tue, 19 Nov 2019 15:18:50 +0000 (15:18 +0000)]
re PR c++/92078 (error: 'struct std::ptr<Iter>' redeclared with different access)

PR c++/92078

gcc/cp/
* pt.c (maybe_new_partial_specialization): Apply access to newly
created partial specializations. Update comment style.

gcc/testsuite/
* g++.dg/cpp2a/concepts-pr92078.C: New.
  * g++.dg/cpp2a/concepts-requires18.C: Update diagnostics.

From-SVN: r278450

4 years agoSuppress diagnostics substituting into a requires-expression (PR c++/92403).
Andrew Sutton [Tue, 19 Nov 2019 15:11:14 +0000 (15:11 +0000)]
Suppress diagnostics substituting into a requires-expression (PR c++/92403).

gcc/cp/
* pt.c (tsubst_copy_and_build): Perform the first substitution without
diagnostics and a second only if tsubst_requries_expr returns an error.

From-SVN: r278449

4 years agoRestore init_ggc_heuristics.
Martin Liska [Tue, 19 Nov 2019 15:07:26 +0000 (16:07 +0100)]
Restore init_ggc_heuristics.

2019-11-19  Martin Liska  <mliska@suse.cz>

* toplev.c (general_init): Move the call...
(toplev::main): ... here as we need init_options_struct
being called.

From-SVN: r278448

4 years ago[Arm] Set Armv7-A tune to Cortex-A53
Wilco Dijkstra [Tue, 19 Nov 2019 14:20:12 +0000 (14:20 +0000)]
[Arm] Set Armv7-A tune to Cortex-A53

By default Armv7-A tunes for Cortex-A8. This is an ancient core
today and the settings are no longer useful for newer cores. So
switch to Cortex-A53 tuning since it works well across a wide range
of modern cores.

On SPECINT2006 the performance gain is 0.7% compared to Cortex-A8 tuning,
and codesize reduces by 0.2%.

    gcc/
* config/arm/arm-cpus.in (armv7): Set tune to Cortex-A53.
(armv7-a): Likewise.
(armv7ve): Likewise.

From-SVN: r278447

4 years agoUpdate loop-1.c test for amdgcn
Andrew Stubbs [Tue, 19 Nov 2019 14:04:27 +0000 (14:04 +0000)]
Update loop-1.c test for amdgcn

2019-11-19  Andrew Stubbs  <ams@codesourcery.com>

gcc/testsuite/
* gcc.dg/tree-ssa/loop-1.c: Change amdgcn assembler scan.

From-SVN: r278446

4 years agore PR tree-optimization/92581 (condition chains vectorized wrongly)
Richard Biener [Tue, 19 Nov 2019 14:00:46 +0000 (14:00 +0000)]
re PR tree-optimization/92581 (condition chains vectorized wrongly)

2019-11-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92581
* tree-vect-loop.c (vect_create_epilog_for_reduction): For
condition reduction chains gather all conditions involved
for computing the index reduction vector.

* gcc.dg/vect/vect-cond-reduc-5.c: New testcase.

From-SVN: r278445

4 years ago[AArch64] Implement Armv8.5-A memory tagging (MTE) intrinsics
Dennis Zhang [Tue, 19 Nov 2019 13:43:39 +0000 (13:43 +0000)]
[AArch64] Implement Armv8.5-A memory tagging (MTE) intrinsics

2019-11-19  Dennis Zhang  <dennis.zhang@arm.com>

* config/aarch64/aarch64-builtins.c (enum aarch64_builtins): Add
AARCH64_MEMTAG_BUILTIN_START, AARCH64_MEMTAG_BUILTIN_IRG,
AARCH64_MEMTAG_BUILTIN_GMI, AARCH64_MEMTAG_BUILTIN_SUBP,
AARCH64_MEMTAG_BUILTIN_INC_TAG, AARCH64_MEMTAG_BUILTIN_SET_TAG,
AARCH64_MEMTAG_BUILTIN_GET_TAG, and AARCH64_MEMTAG_BUILTIN_END.
(aarch64_init_memtag_builtins): New.
(AARCH64_INIT_MEMTAG_BUILTINS_DECL): New macro.
(aarch64_general_init_builtins): Call aarch64_init_memtag_builtins.
(aarch64_expand_builtin_memtag): New.
(aarch64_general_expand_builtin): Call aarch64_expand_builtin_memtag.
(AARCH64_BUILTIN_SUBCODE): New macro.
(aarch64_resolve_overloaded_memtag): New.
(aarch64_resolve_overloaded_builtin_general): New. Call
aarch64_resolve_overloaded_memtag to handle overloaded MTE builtins.
* config/aarch64/aarch64-c.c (aarch64_update_cpp_builtins): Define
__ARM_FEATURE_MEMORY_TAGGING when enabled.
(aarch64_resolve_overloaded_builtin): Call
aarch64_resolve_overloaded_builtin_general.
* config/aarch64/aarch64-protos.h
(aarch64_resolve_overloaded_builtin_general): New declaration.
* config/aarch64/aarch64.h (AARCH64_ISA_MEMTAG): New macro.
(TARGET_MEMTAG): Likewise.
* config/aarch64/aarch64.md (UNSPEC_GEN_TAG): New unspec.
(UNSPEC_GEN_TAG_RND, and UNSPEC_TAG_SPACE): Likewise.
(irg, gmi, subp, addg, ldg, stg): New instructions.
* config/aarch64/arm_acle.h (__arm_mte_create_random_tag): New macro.
(__arm_mte_exclude_tag, __arm_mte_ptrdiff): Likewise.
(__arm_mte_increment_tag, __arm_mte_set_tag): Likewise.
(__arm_mte_get_tag): Likewise.
* config/aarch64/predicates.md (aarch64_memtag_tag_offset): New.
(aarch64_granule16_uimm6, aarch64_granule16_simm9): New.
* config/arm/types.md (memtag): New.
* doc/invoke.texi (-memtag): Update description.

2019-11-19  Dennis Zhang  <dennis.zhang@arm.com>

* gcc.target/aarch64/acle/memtag_1.c: New test.
* gcc.target/aarch64/acle/memtag_2.c: New test.
* gcc.target/aarch64/acle/memtag_3.c: New test.

From-SVN: r278444

4 years agoarm: Fixes for asm-flags vs thumb1 and ilp32
Richard Henderson [Tue, 19 Nov 2019 13:14:20 +0000 (13:14 +0000)]
arm: Fixes for asm-flags vs thumb1 and ilp32

Thumb1 cannot support asm-flags currently, because we don't expose the
flags register to the compiler.  Disable the support for that case.

Adjust the asm-flag-6 test for aarch64 ilp32 correctness.

gcc/
* config/arm/arm-c.c (arm_cpu_builtins): Use def_or_undef_macro
to define __GCC_ASM_FLAG_OUTPUTS__.
* config/arm/arm.c (thumb1_md_asm_adjust): New function.
(arm_option_params_internal): Swap out targetm.md_asm_adjust
depending on TARGET_THUMB1.
* doc/extend.texi (FlagOutputOperands): Document thumb1 restriction.

gcc/testsuite/
* testsuite/gcc.target/arm/asm-flag-3.c: Skip for thumb1.
* testsuite/gcc.target/arm/asm-flag-5.c: Likewise.
* testsuite/gcc.target/arm/asm-flag-6.c: Likewise.
* testsuite/gcc.target/arm/asm-flag-4.c: New test.

* testsuite/gcc.target/aarch64/asm-flag-6.c: Use %w for
asm inputs to cmp instruction for ILP32.

From-SVN: r278443

4 years agolibstdc++: Fix declarations of variable templates
Jonathan Wakely [Tue, 19 Nov 2019 09:34:59 +0000 (09:34 +0000)]
libstdc++: Fix declarations of variable templates

This code is invalid and rejected by other compilers (see PR 92576).

* include/bits/regex.h (ranges::__detail::__enable_view_impl): Fix
declaration.
* include/bits/stl_multiset.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/bits/stl_set.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/bits/unordered_set.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/debug/multiset.h (ranges::__detail::__enable_view_impl):
Likewise.
* include/debug/set.h (ranges::__detail::__enable_view_impl): Likewise.
* include/debug/unordered_set (ranges::__detail::__enable_view_impl):
Likewise.

From-SVN: r278440

4 years agore PR target/92549 (Use x86 xchg instruction more)
Jakub Jelinek [Tue, 19 Nov 2019 09:31:59 +0000 (10:31 +0100)]
re PR target/92549 (Use x86 xchg instruction more)

PR target/92549
* config/i386/i386.md (peephole2 for *swap<mode>): New peephole2.

* gcc.target/i386/pr92549.c: New test.

From-SVN: r278439

4 years agore PR middle-end/91450 (__builtin_mul_overflow(A,B,R) wrong code if product < 0,...
Jakub Jelinek [Tue, 19 Nov 2019 09:15:53 +0000 (10:15 +0100)]
re PR middle-end/91450 (__builtin_mul_overflow(A,B,R) wrong code if product < 0, *R is unsigned, and !(A&B))

PR middle-end/91450
* internal-fn.c (expand_mul_overflow): For s1 * s2 -> ur, if one
operand is negative and one non-negative, compare the non-negative
one against 0 rather than comparing s1 & s2 against 0.  Otherwise,
don't compare (s1 & s2) == 0, but compare separately both s1 == 0
and s2 == 0, unless one of them is known to be negative.  Remove
tem2 variable, use tem where tem2 has been used before.

* gcc.c-torture/execute/pr91450-1.c: New test.
* gcc.c-torture/execute/pr91450-2.c: New test.

From-SVN: r278437

4 years ago* doc/invoke.texi (-gno-internal-reset-location-views): Fix typo.
Eric Botcazou [Tue, 19 Nov 2019 09:12:09 +0000 (09:12 +0000)]
* doc/invoke.texi (-gno-internal-reset-location-views): Fix typo.

From-SVN: r278434

4 years agore PR c++/92504 (ICE on gcc-9 -fopenmp: internal compiler error: tree check: expected...
Jakub Jelinek [Tue, 19 Nov 2019 08:52:31 +0000 (09:52 +0100)]
re PR c++/92504 (ICE on gcc-9 -fopenmp: internal compiler error: tree check: expected tree that contains 'decl common' structure, have 'baselink' in get_inner_reference, at expr.c:7238)

PR c++/92504
* semantics.c (handle_omp_for_class_iterator): Don't call
cp_fully_fold on cond.

* g++.dg/gomp/pr92504.C: New test.

From-SVN: r278433

4 years agore PR tree-optimization/92557 (ICE in omp_clause_aligned_alignment, at omp-low.c...
Jakub Jelinek [Tue, 19 Nov 2019 08:51:31 +0000 (09:51 +0100)]
re PR tree-optimization/92557 (ICE in omp_clause_aligned_alignment, at omp-low.c:4090)

PR tree-optimization/92557
* omp-low.c (omp_clause_aligned_alignment): Punt if TYPE_MODE is not
vmode rather than asserting it always is.

* gcc.dg/gomp/pr92557.c: New test.

From-SVN: r278432

4 years agore PR tree-optimization/92554 (ICE in vect_create_epilog_for_reduction, at tree-vect...
Richard Biener [Tue, 19 Nov 2019 07:33:58 +0000 (07:33 +0000)]
re PR tree-optimization/92554 (ICE in vect_create_epilog_for_reduction, at tree-vect-loop.c:4325)

2019-11-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92554
* tree-vect-loop.c (vect_create_epilog_for_reduction): Look
for the actual condition stmt and deal with sign-changes.

* gcc.dg/vect/pr92554.c: New testcase.

From-SVN: r278431

4 years agore PR tree-optimization/92555 (ICE in exact_div, at poly-int.h:2162)
Richard Biener [Tue, 19 Nov 2019 07:31:28 +0000 (07:31 +0000)]
re PR tree-optimization/92555 (ICE in exact_div, at poly-int.h:2162)

2019-09-19  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92555
* tree-vect-loop.c (vect_update_vf_for_slp): Also scan PHIs
for non-SLP stmts.

* gcc.dg/vect/pr92555.c: New testcase.

From-SVN: r278430

4 years agoInitialize a variable due to -Wmaybe-uninitialized.
Martin Liska [Tue, 19 Nov 2019 07:22:21 +0000 (08:22 +0100)]
Initialize a variable due to -Wmaybe-uninitialized.

2019-11-19  Martin Liska  <mliska@suse.cz>

PR bootstrap/92540
* config/riscv/riscv.c (riscv_address_insns): Initialize
addr in order to remove boostrap -Wmaybe-uninitialized
error.

From-SVN: r278429

4 years agoChange some bad uses of C2x attributes into pedwarns.
Joseph Myers [Tue, 19 Nov 2019 00:21:49 +0000 (00:21 +0000)]
Change some bad uses of C2x attributes into pedwarns.

Certain bad uses of C2x standard attributes (that is, attributes
inside [[]] with only a name but no namespace specified) are
constraint violations, and so should be diagnosed with a pedwarn (or
error) where GCC currently uses a warning.  This patch implements this
in some cases (not yet for attributes used on types, nor for some bad
uses of fallthrough attributes).  Specifically, this applies to
unknown standard attributes (taking care not to pedwarn for nodiscard,
which is known but not implemented for C), and to all currently
implemented standard attributes in attribute declarations (including
when mixed with fallthrough) and on statements.

Bootstrapped with no regressions on x86_64-pc-linux-gnu.

gcc/c:
* c-decl.c (c_warn_unused_attributes): Use pedwarn not warning for
standard attributes.
* c-parser.c (c_parser_std_attribute): Take argument for_tm.  Use
pedwarn for unknown standard attributes and return error_mark_node
for them.

gcc/c-family:
* c-common.c (attribute_fallthrough_p): In C, use pedwarn not
warning for standard attributes mixed with fallthrough attributes.

gcc/testsuite:
* gcc.dg/c2x-attr-fallthrough-5.c, gcc.dg/c2x-attr-syntax-5.c: New
tests.
* gcc.dg/c2x-attr-deprecated-2.c, gcc.dg/c2x-attr-deprecated-4.c,
gcc.dg/c2x-attr-fallthrough-2.c, gcc.dg/c2x-attr-maybe_unused-2.c,
gcc.dg/c2x-attr-maybe_unused-4.c: Expect errors in place of some
warnings.

From-SVN: r278428

4 years agoDaily bump.
GCC Administrator [Tue, 19 Nov 2019 00:16:23 +0000 (00:16 +0000)]
Daily bump.

From-SVN: r278427

4 years agotypeck.c (cp_build_addr_expr_1): Use cp_expr_loc_or_input_loc in three places.
Paolo Carlini [Mon, 18 Nov 2019 23:02:22 +0000 (23:02 +0000)]
typeck.c (cp_build_addr_expr_1): Use cp_expr_loc_or_input_loc in three places.

/cp
2019-11-18  Paolo Carlini  <paolo.carlini@oracle.com>

* typeck.c (cp_build_addr_expr_1): Use cp_expr_loc_or_input_loc
in three places.
(cxx_sizeof_expr): Use it in one additional place.
(cxx_alignof_expr): Likewise.
(lvalue_or_else): Likewise.

/testsuite
2019-11-18  Paolo Carlini  <paolo.carlini@oracle.com>

* g++.dg/cpp0x/addressof2.C: Test locations too.
* g++.dg/cpp0x/rv-lvalue-req.C: Likewise.
* g++.dg/expr/crash2.C: Likewise.
* g++.dg/expr/lval1.C: Likewise.
* g++.dg/expr/unary2.C: Likewise.
* g++.dg/ext/lvaddr.C: Likewise.
* g++.dg/ext/lvalue1.C: Likewise.
* g++.dg/tree-ssa/pr20280.C: Likewise.
* g++.dg/warn/Wplacement-new-size.C: Likewise.
* g++.old-deja/g++.brendan/alignof.C: Likewise.
* g++.old-deja/g++.brendan/sizeof2.C: Likewise.
* g++.old-deja/g++.law/temps1.C: Likewise.

From-SVN: r278424

4 years agoPR middle-end/92493 - ICE in get_origin_and_offset at gimple-ssa-sprintf.c
Martin Sebor [Mon, 18 Nov 2019 22:14:16 +0000 (22:14 +0000)]
PR middle-end/92493 - ICE in get_origin_and_offset at gimple-ssa-sprintf.c

gcc/ChangeLog:

PR tree-optimization/92493
* gimple-ssa-sprintf.c (get_origin_and_offset): Remove spurious
assignment.

gcc/testsuite/ChangeLog:

PR tree-optimization/92493
* gcc.dg/pr92493.c: New test.

From-SVN: r278423

4 years agoRefactor tree-loop-distribution.c for thread safety
Giuliano Belinassi [Mon, 18 Nov 2019 20:05:16 +0000 (20:05 +0000)]
Refactor tree-loop-distribution.c for thread safety

This patch refactors tree-loop-distribution.c for thread safety without
use of C11 __thread feature. All global variables were moved to
`class loop_distribution` which is initialized at ::execute time.

From-SVN: r278421

4 years agore PR ipa/92508 (ICE in do_estimate_edge_time, at ipa-inline-analysis.c:223 since...
Jan Hubicka [Mon, 18 Nov 2019 19:28:53 +0000 (20:28 +0100)]
re PR ipa/92508 (ICE in do_estimate_edge_time, at ipa-inline-analysis.c:223 since r278159)

PR ipa/92508
* ipa-inline.c (inline_small_functions): Add new edges after reseting
caches.
* ipa-inline-analysis.c (do_estimate_edge_time): Fix sanity check.

From-SVN: r278419

4 years agoAdd more C2x attributes tests.
Joseph Myers [Mon, 18 Nov 2019 17:41:40 +0000 (17:41 +0000)]
Add more C2x attributes tests.

This patch adds more tests of C2x attributes, where I found cases that
were handled correctly by my patches but missing from the original
tests.  Tests are added for -std=c11 -pedantic handling of C2x
attribute syntax and corresponding -Wc11-c2x-compat handling; for
struct [[deprecated]]; and for the [[__fallthrough__]] spelling of
[[fallthrough]] in the case of valid fallthrough attributes.

Tested for x86_64-pc-linux-gnu.

* gcc.dg/c11-attr-syntax-1.c, gcc.dg/c11-attr-syntax-2.c,
gcc.dg/c11-attr-syntax-3.c, gcc.dg/c2x-attr-syntax-4.c: New tests.
* gcc.dg/c2x-attr-deprecated-1.c: Also test struct [[deprecated]].
* gcc.dg/c2x-attr-fallthrough-1.c: Also test [[__fallthrough__]].

From-SVN: r278418

4 years agoPR c++/91962 - ICE with reference binding and qualification conversion.
Marek Polacek [Mon, 18 Nov 2019 16:39:24 +0000 (16:39 +0000)]
PR c++/91962 - ICE with reference binding and qualification conversion.

When fixing c++/91889 (r276251) I was assuming that we couldn't have a ck_qual
under a ck_ref_bind, and I was introducing it in the patch and so this
+   if (next_conversion (convs)->kind == ck_qual)
+     {
+       gcc_assert (same_type_p (TREE_TYPE (expr),
+                    next_conversion (convs)->type));
+       /* Strip the cast created by the ck_qual; cp_build_addr_expr
+          below expects an lvalue.  */
+       STRIP_NOPS (expr);
+     }
in convert_like_real was supposed to handle it.  But that assumption was wrong
as this test shows; here we have "(int *)f" where f is of type long int, and
we're converting it to "const int *const &", so we have both ck_ref_bind and
ck_qual.  That means that the new STRIP_NOPS strips an expression it shouldn't
have, and that then breaks when creating a TARGET_EXPR.  So we want to limit
the stripping to the new case only.  This I do by checking need_temporary_p,
which will be 0 in the new case.  Yes, we can set need_temporary_p when
binding a reference directly, but then we won't have a qualification
conversion.  It is possible to have a bit-field, convert it to a pointer,
and then convert that pointer to a more-qualified pointer, but in that case
we're not dealing with an lvalue, so gl_kind is 0, so we won't enter this
block in reference_binding:
 1747   if ((related_p || compatible_p) && gl_kind)

* call.c (convert_like_real) <case ck_ref_bind>: Check need_temporary_p.

* g++.dg/cpp0x/ref-bind7.C: New test.

From-SVN: r278416

4 years agoAdd testcase for already fixed PR ipa/92528
Martin Jambor [Mon, 18 Nov 2019 15:50:06 +0000 (16:50 +0100)]
Add testcase for already fixed PR ipa/92528

2019-11-18  Martin Jambor  <mjambor@suse.cz>

PR ipa/92528
* g++.dg/ipa/pr92528.C: New test.

From-SVN: r278415

4 years agoAdd optabs for accelerating RAW and WAR alias checks
Richard Sandiford [Mon, 18 Nov 2019 15:36:10 +0000 (15:36 +0000)]
Add optabs for accelerating RAW and WAR alias checks

This patch adds optabs that check whether a read followed by a write
or a write followed by a read can be divided into interleaved byte
accesses without changing the dependencies between the bytes.
This is one of the uses of the SVE2 WHILERW and WHILEWR instructions.
(The instructions can also be used to limit the VF at runtime,
but that's future work.)

2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* doc/sourcebuild.texi (vect_check_ptrs): Document.
* optabs.def (check_raw_ptrs_optab, check_war_ptrs_optab): New optabs.
* doc/md.texi: Document them.
* internal-fn.def (IFN_CHECK_RAW_PTRS, IFN_CHECK_WAR_PTRS): New
internal functions.
* internal-fn.h (internal_check_ptrs_fn_supported_p): Declare.
* internal-fn.c (check_ptrs_direct): New macro.
(expand_check_ptrs_optab_fn): Likewise.
(direct_check_ptrs_optab_supported_p): Likewise.
(internal_check_ptrs_fn_supported_p): New fuction.
* tree-data-ref.c: Include internal-fn.h.
(create_ifn_alias_checks): New function.
(create_intersect_range_checks): Use it.
* config/aarch64/iterators.md (SVE2_WHILE_PTR): New int iterator.
(optab, cmp_op): Handle it.
(raw_war, unspec): New int attributes.
* config/aarch64/aarch64.md (UNSPEC_WHILERW, UNSPEC_WHILE_WR): New
constants.
* config/aarch64/predicates.md (aarch64_bytes_per_sve_vector_operand):
New predicate.
* config/aarch64/aarch64-sve2.md (check_<raw_war>_ptrs<mode>): New
expander.
(@aarch64_sve2_while<cmp_op><GPI:mode><PRED_ALL:mode>_ptest): New
pattern.

gcc/testsuite/
* lib/target-supports.exp (check_effective_target_vect_check_ptrs):
New procedure.
* gcc.dg/vect/vect-alias-check-14.c: Expect IFN_CHECK_WAR to be
used, if available.
* gcc.dg/vect/vect-alias-check-15.c: Likewise.
* gcc.dg/vect/vect-alias-check-16.c: Likewise IFN_CHECK_RAW.
* gcc.target/aarch64/sve2/whilerw_1.c: New test.
* gcc.target/aarch64/sve2/whilewr_1.c: Likewise.
* gcc.target/aarch64/sve2/whilewr_2.c: Likewise.

From-SVN: r278414

4 years agoAdd an empty constructor shortcut to build_vector_from_ctor
Richard Sandiford [Mon, 18 Nov 2019 15:29:53 +0000 (15:29 +0000)]
Add an empty constructor shortcut to build_vector_from_ctor

Empty vector constructors are equivalent to zero vectors.  If we handle
that case directly, we can support it for variable-length vectors and
can hopefully make things more efficient for fixed-length vectors.

This is needed by a later C++ patch.

2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree.c (build_vector_from_ctor): Directly return a zero vector for
empty constructors.

From-SVN: r278413

4 years agoTwo RTL CC tweaks for SVE pmore/plast conditions
Richard Sandiford [Mon, 18 Nov 2019 15:29:03 +0000 (15:29 +0000)]
Two RTL CC tweaks for SVE pmore/plast conditions

SVE has two composite conditions:

  pmore == at least one bit set && last bit clear
  plast == no bits set || last bit set

So in general we generate them from:

  A: CC = test bits
  B: reg1 = first condition
  C: CC = test bits
  D: reg2 = second condition
  E: result = (reg1 op reg2)   where op is || or &&

To fold all this into a single test, we need to be able to remove
the redundant C (the cse.c patch) and then fold B, D and E down to
a single condition (the simplify-rtx.c patch).

The underlying conditions are unsigned, so the simplify-rtx.c part needs
to support both unsigned comparisons and AND.  However, to avoid opening
the can of worms that is ANDing FP comparisons for unordered inputs,
I've restricted the new AND handling to cases in which NaNs can be
ignored.  I think this is still a strict extension of what we have now,
it just doesn't go as far as it could.  Going further would need an
entirely different set of testcases so I think would make more sense
as separate work.

2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* cse.c (cse_insn): Delete no-op register moves too.
* simplify-rtx.c (comparison_to_mask): Handle unsigned comparisons.
Take a second comparison to control the value for NE.
(mask_to_comparison): Handle unsigned comparisons.
(simplify_logical_relational_operation): Likewise.  Update call
to comparison_to_mask.  Handle AND if !HONOR_NANs.
(simplify_binary_operation_1): Call the above for AND too.

gcc/testsuite/
* gcc.target/aarch64/sve/acle/asm/ptest_pmore.c: New test.

From-SVN: r278411

4 years agoHandle VIEW_CONVERT_EXPR for variable-length vectors
Richard Sandiford [Mon, 18 Nov 2019 15:27:56 +0000 (15:27 +0000)]
Handle VIEW_CONVERT_EXPR for variable-length vectors

This patch handles VIEW_CONVERT_EXPRs of variable-length VECTOR_CSTs
by adding tree-level versions of native_decode_vector_rtx and
simplify_const_vector_subreg.  It uses the same code for fixed-length
vectors, both to get more coverage and because operating directly on
the compressed encoding should be more efficient for longer vectors
with a regular pattern.

The structure and comments are very similar between the tree and
rtx routines.

2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* fold-const.c (native_encode_vector): Turn into a wrapper function,
splitting the main code out into...
(native_encode_vector_part): ...this new function.
(native_decode_vector_tree): New function.
(fold_view_convert_vector_encoding): Likewise.
(fold_view_convert_expr): Use it for converting VECTOR_CSTs
to VECTOR_TYPEs.

gcc/testsuite/
* gcc.target/aarch64/sve/acle/general/temporaries_1.c: New test.

From-SVN: r278410

4 years agoOptimise WAR and WAW alias checks
Richard Sandiford [Mon, 18 Nov 2019 15:26:55 +0000 (15:26 +0000)]
Optimise WAR and WAW alias checks

For:

  void
  f1 (int *x, int *y)
  {
    for (int i = 0; i < 32; ++i)
      x[i] += y[i];
  }

we checked at runtime whether one vector at x would overlap one vector
at y.  But in cases like this, the vector code would handle x <= y just
fine, since any write to address A still happens after any read from
address A.  The only problem is if x is ahead of y by less than a
vector.

The same is true for two writes:

  void
  f2 (int *x, int *y)
  {
    for (int i = 0; i < 32; ++i)
      {
        x[i] = i;
        y[i] = 2;
      }
  }

if y <= x then a vector write at y after a vector write at x would
have the same net effect as the original scalar writes.

This patch optimises the alias checks for these two cases.  E.g.,
before the patch, f1 used:

        add     x2, x0, 15
        sub     x2, x2, x1
        cmp     x2, 30
        bls     .L2

whereas after the patch it uses:

        add     x2, x1, 4
        sub     x2, x0, x2
        cmp     x2, 8
        bls     .L2

Read-after-write cases like:

  int
  f3 (int *x, int *y)
  {
    int res = 0;
    for (int i = 0; i < 32; ++i)
      {
        x[i] = i;
        res += y[i];
      }
    return res;
  }

can cope with x == y, but otherwise don't allow overlap in either
direction.  Since checking for x == y at runtime would require extra
code, we're probably better off sticking with the current overlap test.

An overlap test is also needed if the scalar or vector accesses covered
by the alias check are mixed together, rather than all statements for
the second access following all statements for the first access.

The new code for gcc.target/aarch64/sve/var_strict_[135].c is slightly
better than before.

2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.c (create_intersect_range_checks_index): If the
alias pair describes simple WAW and WAR dependencies, just check
whether the first B access overlaps later A accesses.
(create_waw_or_war_checks): New function that performs the same
optimization on addresses.
(create_intersect_range_checks): Call it.

gcc/testsuite/
* gcc.dg/vect/vect-alias-check-8.c: Expect WAR/WAW checks to be used.
* gcc.dg/vect/vect-alias-check-14.c: Likewise.
* gcc.dg/vect/vect-alias-check-15.c: Likewise.
* gcc.dg/vect/vect-alias-check-18.c: Likewise.
* gcc.dg/vect/vect-alias-check-19.c: Likewise.
* gcc.target/aarch64/sve/var_stride_1.c: Update expected sequence.
* gcc.target/aarch64/sve/var_stride_2.c: Likewise.
* gcc.target/aarch64/sve/var_stride_3.c: Likewise.
* gcc.target/aarch64/sve/var_stride_5.c: Likewise.

From-SVN: r278409

4 years agoLRA: handle memory constraints that accept more than "m"
Richard Sandiford [Mon, 18 Nov 2019 15:26:07 +0000 (15:26 +0000)]
LRA: handle memory constraints that accept more than "m"

LRA allows address constraints that are more relaxed than "p":

  /* Target hooks sometimes don't treat extra-constraint addresses as
     legitimate address_operands, so handle them specially.  */
  if (insn_extra_address_constraint (cn)
      && satisfies_address_constraint_p (&ad, cn))
    return change_p;

For SVE it's useful to allow the same thing for memory constraints.
The particular use case is LD1RQ, which is an SVE instruction that
addresses Advanced SIMD vector modes and that accepts some addresses
that normal Advanced SIMD moves don't.

Normally we require every memory to satisfy at least "m", which is
defined to be a memory "with any kind of address that the machine
supports in general".  However, LD1RQ is very much special-purpose:
it doesn't really have any relation to normal operations on these
modes.  Adding its addressing modes to "m" would lead to bad Advanced
SIMD optimisation decisions in passes like ivopts.  LD1RQ therefore
has a memory constraint that accepts things "m" doesn't.

2019-11-18  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* lra-constraints.c (valid_address_p): Take the operand and a
constraint as argument.  If the operand is a MEM and the constraint
is a memory constraint, check whether the eliminated form of the
MEM already satisfies the constraint.
(process_address_1): Update calls accordingly.

gcc/testsuite/
* gcc.target/aarch64/sve/acle/asm/ld1rq_f16.c: Remove XFAIL.
* gcc.target/aarch64/sve/acle/asm/ld1rq_f32.c: Likewise.
* gcc.target/aarch64/sve/acle/asm/ld1rq_f64.c: Likewise.
* gcc.target/aarch64/sve/acle/asm/ld1rq_s16.c: Likewise.
* gcc.target/aarch64/sve/acle/asm/ld1rq_s32.c: Likewise.
* gcc.target/aarch64/sve/acle/asm/ld1rq_s64.c: Likewise.
* gcc.target/aarch64/sve/acle/asm/ld1rq_u16.c: Likewise.
* gcc.target/aarch64/sve/acle/asm/ld1rq_u32.c: Likewise.
* gcc.target/aarch64/sve/acle/asm/ld1rq_u64.c: Likewise.

From-SVN: r278408

4 years agoRemove vestiges of MODIFY_JNI_METHOD_CALL
Tom Tromey [Mon, 18 Nov 2019 14:22:57 +0000 (14:22 +0000)]
Remove vestiges of MODIFY_JNI_METHOD_CALL

I happened to notice that MODIFY_JNI_METHOD_CALL was defined in
cygming.h and documented in tm.texi.  However, because it was only
needed for gcj, it is obsolete.  This patch removes the vestiges.

Tested by grep, and rebuilding the documentation.

gcc/ChangeLog
2019-11-18  Tom Tromey  <tromey@adacore.com>

* doc/tm.texi: Rebuild.
* doc/tm.texi.in (Misc): Don't document MODIFY_JNI_METHOD_CALL.
* config/i386/cygming.h (MODIFY_JNI_METHOD_CALL): Don't define.

From-SVN: r278407

4 years agore PR tree-optimization/92516 (ICE in vect_schedule_slp_instance, at tree-vect-slp...
Richard Biener [Mon, 18 Nov 2019 14:07:11 +0000 (14:07 +0000)]
re PR tree-optimization/92516 (ICE in vect_schedule_slp_instance, at tree-vect-slp.c:4095 since r278246)

2019-11-18  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92516
* tree-vect-slp.c (vect_analyze_slp_instance): Add bst_map
argument, hoist bst_map creation/destruction to ...
(vect_analyze_slp): ... here, forming a true graph with
SLP instances being the entries.
(vect_detect_hybrid_slp_stmts): Remove wrapper.
(vect_detect_hybrid_slp): Use one visited set for all
graph entries.
(vect_slp_analyze_node_operations): Simplify visited/lvisited
to hash-sets of slp_tree.
(vect_slp_analyze_operations): Likewise.
(vect_bb_slp_scalar_cost): Remove wrapper.
(vect_bb_vectorization_profitable_p): Use one visited set for
all graph entries.
(vect_schedule_slp_instance): Elide bst_map use.
(vect_schedule_slp): Likewise.

* g++.dg/vect/slp-pr92516.cc: New testcase.

2019-11-18  Richard Biener  <rguenther@suse.de>

* tree-vect-slp.c (vect_analyze_slp_instance): When a CTOR
was vectorized with just external refs fail.

* gcc.dg/vect/vect-ctor-1.c: New testcase.

From-SVN: r278406

4 years agoUnset m_checker in sem_function::init.
Martin Liska [Mon, 18 Nov 2019 13:04:57 +0000 (14:04 +0100)]
Unset m_checker in sem_function::init.

2019-11-18  Martin Liska  <mliska@suse.cz>

PR ipa/92525
* ipa-icf.c (sem_function::init): Unset m_checker
at the end of the function.

From-SVN: r278405

4 years agoRemove strange dump suboptions in testsuite.
Martin Liska [Mon, 18 Nov 2019 12:54:11 +0000 (13:54 +0100)]
Remove strange dump suboptions in testsuite.

2019-11-18  Martin Liska  <mliska@suse.cz>

* gcc.dg/ipa/ipa-icf-36.c: Remove 'all-all-all'.
* gcc.dg/ipa/ipa-icf-37.c: Likewise.

From-SVN: r278404

4 years agofix ChangeLog to reference the PR
Szabolcs Nagy [Mon, 18 Nov 2019 12:46:56 +0000 (12:46 +0000)]
fix ChangeLog to reference the PR

From-SVN: r278403

4 years agolibstdc++: Fix std::jthread bugs
Jonathan Wakely [Mon, 18 Nov 2019 12:46:08 +0000 (12:46 +0000)]
libstdc++: Fix std::jthread bugs

The std::jthread::get_id() function was missing a return statement.

The is_invocable check needs to be done using decayed types, as they'll
be forwarded to std::invoke as rvalues.

Also reduce header dependencies for the <thread> header. We don't need
to include <functional> for std::jthread because <bits/invoke.h> is
already included, which defines std::__invoke. We can also remove
<bits/functexcept.h> which isn't used at all. Finally, when
_GLIBCXX_HAS_GTHREADS is not defined there's no point including any
other headers, since we're not going to define anything in <thread>
anyway.

* include/std/thread: Reduce header dependencies.
(jthread::get_id()): Add missing return.
(jthread::get_stop_token()): Avoid unnecessary stop_source temporary.
(jthread::_S_create): Check is_invocable using decayed types. Add
static assertion.
* testsuite/30_threads/jthread/1.cc: Add dg-require-gthreads.
* testsuite/30_threads/jthread/2.cc: Likewise.
* testsuite/30_threads/jthread/3.cc: New test.
* testsuite/30_threads/jthread/jthread.cc: Add missing directives for
pthread and gthread support. Use VERIFY instead of assert.

From-SVN: r278402

4 years agolibstdc++: Fix some -Wsystem-headers warnings
Jonathan Wakely [Mon, 18 Nov 2019 12:46:02 +0000 (12:46 +0000)]
libstdc++: Fix some -Wsystem-headers warnings

* include/bits/alloc_traits.h (allocator_traits::construct)
(allocator_traits::destroy, allocator_traits::max_size): Add unused
attributes to parameters that are not used in C++20.
* include/std/bit (__ceil2): Add braces around assertion to avoid
-Wmissing-braces warning.

From-SVN: r278401

4 years agore PR tree-optimization/92558 (Miscompare of 554.roms_r with -Ofast -march=znver2...
Richard Biener [Mon, 18 Nov 2019 12:41:11 +0000 (12:41 +0000)]
re PR tree-optimization/92558 (Miscompare of 554.roms_r with -Ofast -march=znver2 -flto since r278289)

2019-11-18  Richard Biener  <rguenther@suse.de>

PR tree-optimization/92558
* tree-vect-loop.c (vect_create_epilog_for_reduction): When
reducting the width of a reduction vector def update new_phis.

* gcc.dg/vect/pr92558.c: New testcase.

From-SVN: r278400

4 years agomusl: Don't use gthr weak refs in libgcc PR91737
Szabolcs Nagy [Mon, 18 Nov 2019 12:08:18 +0000 (12:08 +0000)]
musl: Don't use gthr weak refs in libgcc PR91737

The gthr weak reference based single thread detection is unsafe with
static linking and in case of dynamic linking it's ineffective on musl
since pthread symbols are defined in libc.so.

(Ideally this should be fixed for all targets, since glibc plans to move
libpthread.so into libc.so too and users want to static link to pthread
without --whole-archive: PR87189.)

For now we have to explicitly opt out from the broken behaviour in the
config machinery of each target lib and libgcc was previously missed.

libgcc/ChangeLog:

2019-11-18  Szabolcs Nagy  <szabolcs.nagy@arm.com>

* config.host: Add t-gthr-noweak on *-*-musl*.
* config/t-gthr-noweak: New file.

From-SVN: r278399

4 years agomusl: use correct long double abi by default
Szabolcs Nagy [Mon, 18 Nov 2019 12:03:18 +0000 (12:03 +0000)]
musl: use correct long double abi by default

On powerpc and s390x the musl ABI requires 64 bit and 128 bit long
double respectively, so adjust the default.

gcc/ChangeLog:

2019-11-18  Szabolcs Nagy  <szabolcs.nagy@arm.com>

* configure.ac (gcc_cv_target_ldbl128): Set for powerpc*-*-linux-musl*
and s390*-*-linux-musl* targets.
* configure: Regenerate.

From-SVN: r278398

4 years agos390: add musl support
Szabolcs Nagy [Mon, 18 Nov 2019 12:00:45 +0000 (12:00 +0000)]
s390: add musl support

Add the musl dynamic linker names.

gcc/ChangeLog:

2019-11-18  Szabolcs Nagy  <szabolcs.nagy@arm.com>

* config/s390/linux.h (MUSL_DYNAMIC_LINKER32): Define.
(MUSL_DYNAMIC_LINKER64): Define.

From-SVN: r278397

4 years agoImprove -dbg-cnt error message and support :0.
Martin Liska [Mon, 18 Nov 2019 11:51:20 +0000 (12:51 +0100)]
Improve -dbg-cnt error message and support :0.

2019-11-18  Martin Liska  <mliska@suse.cz>

* dbgcnt.c (dbg_cnt_set_limit_by_name): Provide error
message for an unknown counter.
(dbg_cnt_process_single_pair): Support 0 as minimum value.
(dbg_cnt_process_opt): Remove unreachable code.

From-SVN: r278396

4 years agoVerify NOP_EXPR LHS type in IPA ICF.
Martin Liska [Mon, 18 Nov 2019 11:51:05 +0000 (12:51 +0100)]
Verify NOP_EXPR LHS type in IPA ICF.

2019-11-18  Martin Liska  <mliska@suse.cz>

PR ipa/92529
* ipa-icf-gimple.c (func_checker::compare_gimple_assign):
Compare LHS types of NOP_EXPR.
2019-11-18  Martin Liska  <mliska@suse.cz>

PR ipa/92529
* gcc.dg/ipa/pr92529.c: New test.

From-SVN: r278395

4 years ago[mid-end][__RTL] Clean state despite unspecified __RTL startwith passes
Matthew Malcomson [Mon, 18 Nov 2019 11:16:46 +0000 (11:16 +0000)]
[mid-end][__RTL] Clean state despite unspecified __RTL startwith passes

Hi there,

When compiling an __RTL function that has an unspecified "startwith"
pass we currently don't run the cleanup pass, this means that we ICE on
the next function (if it's a basic function).

This change ensures that the clean_state pass is run even if the
startwith pass is unspecified.

We also ensure the name of the startwith pass is always freed correctly.

As an example, before this change the following code would ICE when compiling
the function `foo_a`.

When compiled with
./aarch64-none-linux-gnu-gcc -O0 -S unspecified-pass-error.c -o test.s

```
int __RTL () badfoo ()
{
(function "badfoo"
  (insn-chain
    (block 2
      (edge-from entry (flags "FALLTHRU"))
      (cnote 3 [bb 2] NOTE_INSN_BASIC_BLOCK)
      (cinsn 101 (set (reg:DI x19) (reg:DI x0)))
      (cinsn 10 (use (reg/i:SI x19)))
      (edge-to exit (flags "FALLTHRU"))
    ) ;; block 2
  ) ;; insn-chain
) ;; function "foo2"
}

int
foo_a ()
{
  return 200;
}
```

Now it silently ignores the __RTL function and successfully compiles foo_a.

regtest done on aarch64
regtest done on x86_64

OK for trunk?

gcc/ChangeLog:

2019-11-18  Matthew Malcomson  <matthew.malcomson@arm.com>

* run-rtl-passes.c (run_rtl_passes): Accept and handle empty
"initial_pass_name" argument -- by running "*clean_state" pass.
Also free the "initial_pass_name" when done.

gcc/c/ChangeLog:

2019-11-18  Matthew Malcomson  <matthew.malcomson@arm.com>

* c-parser.c (c_parser_parse_rtl_body): Always call
run_rtl_passes, even if startwith pass is not provided.

gcc/testsuite/ChangeLog:

2019-11-18  Matthew Malcomson  <matthew.malcomson@arm.com>

* gcc.dg/rtl/aarch64/unspecified-pass-error.c: New test.

From-SVN: r278393

4 years agore PR target/92462 ([arm32] -ftree-pre makes a variable to be wrongly hoisted out)
Richard Biener [Mon, 18 Nov 2019 09:44:52 +0000 (09:44 +0000)]
re PR target/92462 ([arm32] -ftree-pre makes a variable to be wrongly hoisted out)

2019-11-18  Richard Biener  <rguenther@suse.de>

PR rtl-optimization/92462
* alias.c (find_base_term): Restrict the look through ANDs.
(find_base_value): Likewise.

From-SVN: r278391

4 years ago[testsuite][ARM] check_effective_target_arm_vfp_ok_nocache: Fix typo in option name
Christophe Lyon [Mon, 18 Nov 2019 09:20:18 +0000 (09:20 +0000)]
[testsuite][ARM] check_effective_target_arm_vfp_ok_nocache: Fix typo in option name

2019-11-18  Christophe Lyon  <christophe.lyon@linaro.org>

* lib/target-supports.exp
(check_effective_target_arm_vfp_ok_nocache): Fix typo in option
name.

From-SVN: r278390

4 years agore PR target/92545 (avr: support ATmega devices from the 0-series)
Georg-Johann Lay [Mon, 18 Nov 2019 08:19:08 +0000 (08:19 +0000)]
re PR target/92545 (avr: support ATmega devices from the 0-series)

PR target/92545
* config/avr/gen-avr-mmcu-specs.c (print_mcu)
[link_pm_base_address]: Symbol name is __RODATA_PM_OFFSET__.

From-SVN: r278389

4 years agore PR target/92545 (avr: support ATmega devices from the 0-series)
Georg-Johann Lay [Mon, 18 Nov 2019 07:54:30 +0000 (07:54 +0000)]
re PR target/92545 (avr: support ATmega devices from the 0-series)

PR target/92545
* doc/avr-mmcu.texi: Regenerate.

From-SVN: r278388

4 years agoAdd support for AVR devices from the 0-series.
Georg-Johann Lay [Mon, 18 Nov 2019 07:52:55 +0000 (07:52 +0000)]
Add support for AVR devices from the 0-series.

PR target/92545
* config/avr/avr-arch.h (avr_mcu_t) <flash_pm_offset>: New field.
* config/avr/avr-devices.c (avr_mcu_types): Adjust initializers.
* config/avr/avr-mcus.def (AVR_MCU): Add respective field.
* config/avr/specs.h (LINK_SPEC) <%(link_pm_base_address)>: Add.
* config/avr/gen-avr-mmcu-specs.c (print_mcu)
<*cpp, *cpp_mcu, *cpp_avrlibc, *link_pm_base_address>: Emit code
for spec definitions.
* doc/avr-mmcu.texi: Regenerate.

From-SVN: r278387

4 years agoSplit X86_TUNE_AVX128_OPTIMAL into X86_TUNE_AVX256_SPLIT_REGS
Hongtao Liu [Mon, 18 Nov 2019 02:22:55 +0000 (02:22 +0000)]
Split X86_TUNE_AVX128_OPTIMAL into X86_TUNE_AVX256_SPLIT_REGS
and X86_TUNE_AVX128_OPTIMAL.

Changelog
gcc/
PR target/92448
* config/i386/i386-expand.c (ix86_expand_set_or_cpymem):
Replace TARGET_AVX128_OPTIMAL with TARGET_AVX256_SPLIT_REGS.
* config/i386/i386-option.c (ix86_vec_cost): Ditto.
(ix86_reassociation_width): Ditto.
* config/i386/i386-options.c (ix86_option_override_internal):
Replace TARGET_AVX128_OPTIAML with
ix86_tune_features[X86_TUNE_AVX128_OPTIMAL]
* config/i386/i386.h (TARGET_AVX256_SPLIT_REGS): New macro.
(TARGET_AVX128_OPTIMAL): Deleted.
* config/i386/x86-tune.def (X86_TUNE_AVX256_SPLIT_REGS): New
DEF_TUNE.

From-SVN: r278385

4 years agolibgomp: Regenerate `testsuite/Makefile.in' for GCC_HEADER_STDINT removal
Maciej W. Rozycki [Mon, 18 Nov 2019 00:33:37 +0000 (00:33 +0000)]
libgomp: Regenerate `testsuite/Makefile.in' for GCC_HEADER_STDINT removal

Commit r276389 ("configure.ac: Remove GCC_HEADER_STDINT(gstdint.h)") has
not regenerated `testsuite/Makefile.in'.  Fix it.

libgomp/
* testsuite/Makefile.in: Regenerate.

From-SVN: r278384

4 years agolibgfortran: Regenerate `Makefile.in' for `runstatedir' removal
Maciej W. Rozycki [Mon, 18 Nov 2019 00:21:45 +0000 (00:21 +0000)]
libgfortran: Regenerate `Makefile.in' for `runstatedir' removal

A change made with r271340 ("libfortran/90038: Use posix_spawn instead
of fork") accidentally brought the obsolete `runstatedir' setting back
in.  Fix it.

libgfortran/
* Makefile.in: Regenerate.

From-SVN: r278383

4 years agoDaily bump.
GCC Administrator [Mon, 18 Nov 2019 00:16:13 +0000 (00:16 +0000)]
Daily bump.

From-SVN: r278382

4 years agolinux-atomic.c (__kernel_cmpxchg): Change argument 1 to volatile void *.
John David Anglin [Sun, 17 Nov 2019 23:11:52 +0000 (23:11 +0000)]
linux-atomic.c (__kernel_cmpxchg): Change argument 1 to volatile void *.

* config/pa/linux-atomic.c (__kernel_cmpxchg): Change argument 1 to
volatile void *.  Remove trap check.
(__kernel_cmpxchg2): Likewise.
(FETCH_AND_OP_2): Adjust operand types.
(OP_AND_FETCH_2): Likewise.
(FETCH_AND_OP_WORD): Likewise.
(OP_AND_FETCH_WORD): Likewise.
(COMPARE_AND_SWAP_2): Likewise.
(__sync_val_compare_and_swap_4): Likewise.
(__sync_bool_compare_and_swap_4): Likewise.
(SYNC_LOCK_TEST_AND_SET_2): Likewise.
(__sync_lock_test_and_set_4): Likewise.
(SYNC_LOCK_RELEASE_1): Likewise.  Use __kernel_cmpxchg2 for release.
(__sync_lock_release_4): Adjust operand types.  Use __kernel_cmpxchg
for release.
(__sync_lock_release_8): Remove.

From-SVN: r278377

4 years ago* gcc.dg/complex-6.c: Do not run dump scan tests for rx target.
Jeff Law [Sun, 17 Nov 2019 16:31:32 +0000 (09:31 -0700)]
* gcc.dg/complex-6.c: Do not run dump scan tests for rx target.

From-SVN: r278376

4 years agomethod.c (lookup_comparison_result): Use %qD instead of %<%T::%D%> to print the decl.
Jakub Jelinek [Sun, 17 Nov 2019 06:12:01 +0000 (07:12 +0100)]
method.c (lookup_comparison_result): Use %qD instead of %<%T::%D%> to print the decl.

* method.c (lookup_comparison_result): Use %qD instead of %<%T::%D%>
to print the decl.
(lookup_comparison_category): Use %qD instead of %<std::%D%> to print
the decl.

* g++.dg/cpp2a/spaceship-err3.C: New test.

From-SVN: r278375

4 years agoRepair the <tuple> part of C++20 p1032 Misc constexpr bits.
Edward Smith-Rowland [Sun, 17 Nov 2019 03:31:15 +0000 (03:31 +0000)]
Repair the <tuple> part of C++20 p1032 Misc constexpr bits.

2019-11-16  Edward Smith-Rowland  <3dw4rd@verizon.net>

Repair the <tuple> part of C++20 p1032 Misc constexpr bits.
* include/bits/uses_allocator.h (__uses_alloc0::_Sink::operaror=)
(__use_alloc(const _Alloc&)) : Constexpr.

From-SVN: r278373

4 years agolibstdc++: add range constructor for std::string_view (P1391R4)
Jonathan Wakely [Sun, 17 Nov 2019 01:32:55 +0000 (01:32 +0000)]
libstdc++: add range constructor for std::string_view (P1391R4)

* include/std/string_view (basic_string_view(It, End)): Add range
constructor and deduction guide from P1391R4.
* testsuite/21_strings/basic_string_view/cons/char/range.cc: New test.

From-SVN: r278371

4 years agolibstdc++: Define C++20 range utilities and range factories
Jonathan Wakely [Sun, 17 Nov 2019 01:07:54 +0000 (01:07 +0000)]
libstdc++: Define C++20 range utilities and range factories

This adds another chunk of the <ranges> header.

The changes from P1456R1 (Move-only views) and P1862R1 (Range adaptors
for non-copyable iterators) are included, but not the changes from
P1870R1 (forwarding-range<T> is too subtle).

The tests for subrange and iota_view are poor and should be improved.

* include/bits/regex.h (match_results): Specialize __enable_view_impl.
* include/bits/stl_set.h (set): Likewise.
* include/bits/unordered_set.h (unordered_set, unordered_multiset):
Likewise.
* include/debug/multiset.h (__debug::multiset): Likewise.
* include/debug/set.h (__debug::set): Likewise.
* include/debug/unordered_set (__debug::unordered_set)
(__debug::unordered_multiset): Likewise.
* include/std/ranges (ranges::view, ranges::enable_view)
(ranges::view_interface, ranges::subrange, ranges::empty_view)
(ranges::single_view, ranges::views::single, ranges::iota_view)
(ranges::views::iota): Define for C++20.
* testsuite/std/ranges/empty_view.cc: New test.
* testsuite/std/ranges/iota_view.cc: New test.
* testsuite/std/ranges/single_view.cc: New test.
* testsuite/std/ranges/view.cc: New test.

From-SVN: r278370

4 years agoDaily bump.
GCC Administrator [Sun, 17 Nov 2019 00:16:14 +0000 (00:16 +0000)]
Daily bump.

From-SVN: r278369

4 years agors6000: Allow mode GPR in cceq_{ior,rev}_compare
Segher Boessenkool [Sat, 16 Nov 2019 23:31:19 +0000 (00:31 +0100)]
rs6000: Allow mode GPR in cceq_{ior,rev}_compare

Also make it a parmeterized name: @cceq_{ior,rev}_compare_<mode>.

* config/rs6000/rs6000.md (cceq_ior_compare): Rename to...
(@cceq_ior_compare_<mode> for GPR): ... this.  Allow GPR instead of
just SI.
(cceq_rev_compare): Rename to...
(@cceq_rev_compare_<mode> for GPR): ... this.  Allow GPR instead of
just SI.
(define_split for <bd>tf_<mode>): Add SImode first argument to
gen_cceq_ior_compare.

From-SVN: r278366

4 years agoRevert r278363 "Start work on <ranges> header"
Jonathan Wakely [Sat, 16 Nov 2019 22:00:23 +0000 (22:00 +0000)]
Revert r278363 "Start work on <ranges> header"

This was not meant to be on the branch I committed r278364 from, as it
is not ready to commit yet.

* include/std/ranges: Revert accidentally committed changes.

From-SVN: r278365

4 years agolibstdc++: Optimize std::jthread construction
Jonathan Wakely [Sat, 16 Nov 2019 21:47:28 +0000 (21:47 +0000)]
libstdc++: Optimize std::jthread construction

This change avoids storing a copy of a stop_token object that isn't
needed and won't be passed to the callable object. This slightly reduces
memory usage when the callable doesn't use a stop_token. It also removes
indirection in the invocation of the callable in the new thread, as
there is no lambda and no additional calls to std::invoke.

It also adds some missing [[nodiscard]] attributes, and the non-member
swap overload for std::jthread.

* include/std/thread (jthread::jthread()): Use nostopstate constant.
(jthread::jthread(Callable&&, Args&&...)): Use helper function to
create std::thread instead of indirection through a lambda. Use
remove_cvref_t instead of decay_t.
(jthread::joinable(), jthread::get_id(), jthread::native_handle())
(jthread::hardware_concurrency()): Add nodiscard attribute.
(swap(jthread&. jthread&)): Define hidden friend.
(jthread::_S_create): New helper function for constructor.

From-SVN: r278364

4 years agoStart work on <ranges> header
Jonathan Wakely [Sat, 16 Nov 2019 21:47:22 +0000 (21:47 +0000)]
Start work on <ranges> header

From-SVN: r278363

4 years agoDelete common/config/powerpcspe
Segher Boessenkool [Sat, 16 Nov 2019 19:32:12 +0000 (20:32 +0100)]
Delete common/config/powerpcspe

I missed this part in r266961.  Various people have been editing it
since; I finally noticed.

* common/config/powerpcspe: Delete.

From-SVN: r278361

4 years ago[PATCH] Fix slowness in demangler
Jeff Law [Sat, 16 Nov 2019 17:14:14 +0000 (10:14 -0700)]
[PATCH] Fix slowness in demangler

* cp-demangle.c (d_print_init): Remove const from 4th param.
(cplus_demangle_fill_name): Initialize d->d_counting.
(cplus_demangle_fill_extended_operator): Likewise.
(cplus_demangle_fill_ctor): Likewise.
(cplus_demangle_fill_dtor): Likewise.
(d_make_empty): Likewise.
(d_count_templates_scopes): Remobe const from 3rd param,
Return on dc->d_counting > 1,
Increment dc->d_counting.
        * cp-demint.c (cplus_demangle_fill_component): Initialize d->d_counting.
(cplus_demangle_fill_builtin_type): Likewise.
(cplus_demangle_fill_operator): Likewise.

* demangle.h (struct demangle_component): Add member
d_counting.

From-SVN: r278359

4 years ago[PATCH] Refactor rust-demangle to be independent of C++ demangling.
Eduard-Mihai Burtescu [Sat, 16 Nov 2019 15:32:50 +0000 (16:32 +0100)]
[PATCH] Refactor rust-demangle to be independent of C++ demangling.

* demangle.h (rust_demangle_callback): Add.

* cplus-dem.c (cplus_demangle): Use rust_demangle directly.
(rust_demangle): Remove.
* rust-demangle.c (is_prefixed_hash): Rename to is_legacy_prefixed_hash.
(parse_lower_hex_nibble): Rename to decode_lower_hex_nibble.
(parse_legacy_escape): Rename to decode_legacy_escape.
(rust_is_mangled): Remove.
(struct rust_demangler): Add.
(peek): Add.
(next): Add.
(struct rust_mangled_ident): Add.
(parse_ident): Add.
(rust_demangle_sym): Remove.
(print_str): Add.
(PRINT): Add.
(print_ident): Add.
(rust_demangle_callback): Add.
(struct str_buf): Add.
(str_buf_reserve): Add.
(str_buf_append): Add.
(str_buf_demangle_callback): Add.
(rust_demangle): Add.
* rust-demangle.h: Remove.

From-SVN: r278358

4 years ago* testsuite/demangle-expected: Fix test.
Miguel Saldivar [Sat, 16 Nov 2019 14:45:30 +0000 (14:45 +0000)]
* testsuite/demangle-expected: Fix test.

From-SVN: r278357

4 years ago[AArch64] Robustify aarch64_wrffr
Richard Sandiford [Sat, 16 Nov 2019 13:31:28 +0000 (13:31 +0000)]
[AArch64] Robustify aarch64_wrffr

This patch uses distinct values for the FFR and FFRT outputs of
aarch64_wrffr, so that a following aarch64_copy_ffr_to_ffrt has
an effect.  This is needed to avoid regressions with later patches.

The block comment at the head of the file already described
the pattern this way, and there was already an unspec for it.
Not sure what made me change it...

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* config/aarch64/aarch64-sve.md (aarch64_wrffr): Wrap the FFRT
output in UNSPEC_WRFFR.

From-SVN: r278356

4 years agoUse a single comparison for index-based alias checks
Richard Sandiford [Sat, 16 Nov 2019 11:43:31 +0000 (11:43 +0000)]
Use a single comparison for index-based alias checks

This patch rewrites the index-based alias checks to use conditions
of the form:

  (unsigned T) (a - b + bias) <= limit

E.g. before the patch:

  struct s { int x[100]; };

  void
  f1 (struct s *s1, int a, int b)
  {
    for (int i = 0; i < 32; ++i)
      s1->x[i + a] += s1->x[i + b];
  }

used:

        add     w3, w1, 3
        cmp     w3, w2
        add     w3, w2, 3
        ccmp    w1, w3, 0, ge
        ble     .L2

whereas after the patch it uses:

        sub     w3, w1, w2
        add     w3, w3, 3
        cmp     w3, 6
        bls     .L2

The patch also fixes the seg_len1 and seg_len2 negation for cases in
which seg_len is a "negative unsigned" value narrower than 64 bits,
like it is for 32-bit targets.  Previously we'd end up with values
like 0xffffffff000000001 instead of 1.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.c (create_intersect_range_checks_index): Rewrite
the index tests to have the form (unsigned T) (B - A + bias) <= limit.

gcc/testsuite/
* gcc.dg/vect/vect-alias-check-18.c: New test.
* gcc.dg/vect/vect-alias-check-19.c: Likewise.
* gcc.dg/vect/vect-alias-check-20.c: Likewise.

From-SVN: r278354

4 years agoPrint the type of alias check in a dump message
Richard Sandiford [Sat, 16 Nov 2019 11:42:53 +0000 (11:42 +0000)]
Print the type of alias check in a dump message

This patch prints a message to say how an alias check is being
implemented.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.c (create_intersect_range_checks_index)
(create_intersect_range_checks): Print dump messages.

gcc/testsuite/
* gcc.dg/vect/vect-alias-check-1.c: Test for the type of alias check.
* gcc.dg/vect/vect-alias-check-8.c: Likewise.
* gcc.dg/vect/vect-alias-check-9.c: Likewise.
* gcc.dg/vect/vect-alias-check-10.c: Likewise.
* gcc.dg/vect/vect-alias-check-11.c: Likewise.
* gcc.dg/vect/vect-alias-check-12.c: Likewise.
* gcc.dg/vect/vect-alias-check-13.c: Likewise.
* gcc.dg/vect/vect-alias-check-14.c: Likewise.
* gcc.dg/vect/vect-alias-check-15.c: Likewise.
* gcc.dg/vect/vect-alias-check-16.c: Likewise.
* gcc.dg/vect/vect-alias-check-17.c: Likewise.

From-SVN: r278353

4 years agoDump the list of merged alias pairs
Richard Sandiford [Sat, 16 Nov 2019 11:42:02 +0000 (11:42 +0000)]
Dump the list of merged alias pairs

This patch dumps the final (merged) list of alias pairs.  It also adds:

- WAW and RAW versions of vect-alias-check-8.c
- a "well-ordered" version of vect-alias-check-9.c (i.e. all reads
  before any writes)
- a test with mixed steps in the same alias pair

I also tweaked the test value in vect-alias-check-9.c so that the
result was less likely to be accidentally correct if the alias
isn't honoured.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.c (dump_alias_pair): New function.
(prune_runtime_alias_test_list): Use it to dump each merged alias pair.

gcc/testsuite/
* gcc.dg/vect/vect-alias-check-8.c: Test for the RAW flag.
* gcc.dg/vect/vect-alias-check-9.c: Test for the ARBITRARY flag.
(TEST_VALUE): Use a higher value for early iterations.
* gcc.dg/vect/vect-alias-check-14.c: New test.
* gcc.dg/vect/vect-alias-check-15.c: Likewise.
* gcc.dg/vect/vect-alias-check-16.c: Likewise.
* gcc.dg/vect/vect-alias-check-17.c: Likewise.

From-SVN: r278352

4 years agoRecord whether a dr_with_seg_len contains mixed steps
Richard Sandiford [Sat, 16 Nov 2019 11:41:16 +0000 (11:41 +0000)]
Record whether a dr_with_seg_len contains mixed steps

prune_runtime_alias_test_list can merge dr_with_seg_len_pair_ts that
have different steps for the first reference or different steps for the
second reference.  This patch adds a flag to record that.

I don't know whether the change to create_intersect_range_checks_index
fixes anything in practice.  It would have to be a corner case if so,
since at present we only merge two alias pairs if either the first or
the second references are identical and only the other references differ.
And the vectoriser uses VF-based segment lengths only if both references
in a pair have the same step.  Either way, it still seems wrong to use
DR_STEP when it doesn't represent all checks that have been merged into
the pair.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.h (DR_ALIAS_MIXED_STEPS): New flag.
* tree-data-ref.c (prune_runtime_alias_test_list): Set it when
merging data references with different steps.
(create_intersect_range_checks_index): Take a
dr_with_seg_len_pair_t instead of two dr_with_seg_lens.
Bail out if DR_ALIAS_MIXED_STEPS is set.
(create_intersect_range_checks): Take a dr_with_seg_len_pair_t
instead of two dr_with_seg_lens.  Update call to
create_intersect_range_checks_index.
(create_runtime_alias_checks): Update call accordingly.

From-SVN: r278351

4 years agoAdd flags to dr_with_seg_len_pair_t
Richard Sandiford [Sat, 16 Nov 2019 11:40:22 +0000 (11:40 +0000)]
Add flags to dr_with_seg_len_pair_t

This patch adds a bunch of flags to dr_with_seg_len_pair_t,
for use by later patches.  The update to tree-loop-distribution.c
is conservatively correct, but might be tweakable later.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.h (DR_ALIAS_RAW, DR_ALIAS_WAR, DR_ALIAS_WAW)
(DR_ALIAS_ARBITRARY, DR_ALIAS_SWAPPED, DR_ALIAS_UNSWAPPED): New flags.
(dr_with_seg_len_pair_t::sequencing): New enum.
(dr_with_seg_len_pair_t::flags): New member variable.
(dr_with_seg_len_pair_t::dr_with_seg_len_pair_t): Take a sequencing
parameter and initialize the flags member variable.
* tree-loop-distribution.c (compute_alias_check_pairs): Update
call accordingly.
* tree-vect-data-refs.c (vect_prune_runtime_alias_test_list): Likewise.
Ensure the two data references in an alias pair are in statement
order, if there is a defined order.
* tree-data-ref.c (prune_runtime_alias_test_list): Use
DR_ALIAS_SWAPPED and DR_ALIAS_UNSWAPPED to record whether we've
swapped the references in a dr_with_seg_len_pair_t.  OR together
the flags when merging two dr_with_seg_len_pair_ts.  After merging,
try to restore the original dr_with_seg_len order, updating the
flags if that fails.

From-SVN: r278350

4 years agoDelay swapping data refs in prune_runtime_alias_test_list
Richard Sandiford [Sat, 16 Nov 2019 11:35:56 +0000 (11:35 +0000)]
Delay swapping data refs in prune_runtime_alias_test_list

prune_runtime_alias_test_list swapped dr_as between two dr_with_seg_len
pairs before finally deciding whether to merge them.  Bailing out later
would therefore leave the pairs in an incorrect state.

IMO a better fix would be to split this out into a subroutine that
produces a temporary dr_with_seg_len on success, rather than changing
an existing one in-place.  It would then be easy to merge both the dr_as
and dr_bs if we wanted to, rather than requiring one of them to be equal.
But here I tried to do something that could be backported if necessary.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.c (prune_runtime_alias_test_list): Delay
swapping the dr_as based on init values until we've decided
whether to merge them.

From-SVN: r278349

4 years agoMove canonicalisation of dr_with_seg_len_pair_ts
Richard Sandiford [Sat, 16 Nov 2019 11:35:08 +0000 (11:35 +0000)]
Move canonicalisation of dr_with_seg_len_pair_ts

The two users of tree-data-ref's runtime alias checks both canonicalise
the order of the dr_with_seg_lens in a pair before passing them to
prune_runtime_alias_test_list.  It's more convenient for later patches
if prune_runtime_alias_test_list does that itself.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* tree-data-ref.c (prune_runtime_alias_test_list): Sort the
two accesses in each dr_with_seg_len_pair_t before trying to
combine separate dr_with_seg_len_pair_ts.
* tree-loop-distribution.c (compute_alias_check_pairs): Don't do
that here.
* tree-vect-data-refs.c (vect_prune_runtime_alias_test_list): Likewise.

From-SVN: r278348

4 years ago[AArch64] Add scatter stores for partial SVE modes
Richard Sandiford [Sat, 16 Nov 2019 11:30:46 +0000 (11:30 +0000)]
[AArch64] Add scatter stores for partial SVE modes

This patch adds support for scatter stores of partial vectors,
where the vector base or offset elements can be wider than the
elements being stored.

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* config/aarch64/aarch64-sve.md
(scatter_store<SVE_FULL_SD:mode><v_int_equiv>): Extend to...
(scatter_store<SVE_24:mode><v_int_container>): ...this.
(mask_scatter_store<SVE_FULL_S:mode><v_int_equiv>): Extend to...
(mask_scatter_store<SVE_4:mode><v_int_equiv>): ...this.
(mask_scatter_store<SVE_FULL_D:mode><v_int_equiv>): Extend to...
(mask_scatter_store<SVE_2:mode><v_int_equiv>): ...this.
(*mask_scatter_store<mode><v_int_container>_<su>xtw_unpacked): New
pattern.
(*mask_scatter_store<SVE_FULL_D:mode><v_int_equiv>_sxtw): Extend to...
(*mask_scatter_store<SVE_2:mode><v_int_equiv>_sxtw): ...this.
(*mask_scatter_store<SVE_FULL_D:mode><v_int_equiv>_uxtw): Extend to...
(*mask_scatter_store<SVE_2:mode><v_int_equiv>_uxtw): ...this.

gcc/testsuite/
* gcc.target/aarch64/sve/scatter_store_1.c (TEST_LOOP): Start at 0.
(TEST_ALL): Add tests for 8-bit and 16-bit elements.
* gcc.target/aarch64/sve/scatter_store_2.c: Update accordingly.
* gcc.target/aarch64/sve/scatter_store_3.c (TEST_LOOP): Start at 0.
(TEST_ALL): Add tests for 8-bit and 16-bit elements.
* gcc.target/aarch64/sve/scatter_store_4.c: Update accordingly.
* gcc.target/aarch64/sve/scatter_store_5.c (TEST_LOOP): Start at 0.
(TEST_ALL): Add tests for 8-bit, 16-bit and 32-bit elements.
* gcc.target/aarch64/sve/scatter_store_8.c: New test.
* gcc.target/aarch64/sve/scatter_store_9.c: Likewise.

From-SVN: r278347

4 years ago[AArch64] Pattern-match SVE extending gather loads
Richard Sandiford [Sat, 16 Nov 2019 11:26:11 +0000 (11:26 +0000)]
[AArch64] Pattern-match SVE extending gather loads

This patch pattern-matches a partial gather load followed by a sign or
zero extension into an extending gather load.  (The partial gather load
is already an extending load; we just don't rely on the upper bits of
the elements.)

2019-11-16  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
* config/aarch64/iterators.md (SVE_2BHSI, SVE_2HSDI, SVE_4BHI)
(SVE_4HSI): New mode iterators.
(ANY_EXTEND2): New code iterator.
* config/aarch64/aarch64-sve.md
(@aarch64_gather_load_<ANY_EXTEND:optab><VNx4_WIDE:mode><VNx4_NARROW:mode>):
Extend to...
(@aarch64_gather_load_<ANY_EXTEND:optab><SVE_4HSI:mode><SVE_4BHI:mode>):
...this, handling extension to partial modes as well as full modes.
Describe the extension as a predicated rather than unpredicated
extension.
(@aarch64_gather_load_<ANY_EXTEND:optab><VNx2_WIDE:mode><VNx2_NARROW:mode>):
Likewise extend to...
(@aarch64_gather_load_<ANY_EXTEND:optab><SVE_2HSDI:mode><SVE_2BHSI:mode>):
...this, making the same adjustments.
(*aarch64_gather_load_<ANY_EXTEND:optab><VNx2_WIDE:mode><VNx2_NARROW:mode>_sxtw):
Likewise extend to...
(*aarch64_gather_load_<ANY_EXTEND:optab><SVE_2HSDI:mode><SVE_2BHSI:mode>_sxtw)
...this, making the same adjustments.
(*aarch64_gather_load_<ANY_EXTEND:optab><VNx2_WIDE:mode><VNx2_NARROW:mode>_uxtw):
Likewise extend to...
(*aarch64_gather_load_<ANY_EXTEND:optab><SVE_2HSDI:mode><SVE_2BHSI:mode>_uxtw)
...this, making the same adjustments.
(*aarch64_gather_load_<ANY_EXTEND:optab><SVE_2HSDI:mode><SVE_2BHSI:mode>_<ANY_EXTEND2:su>xtw_unpacked):
New pattern.
(*aarch64_ldff1_gather<mode>_sxtw): Canonicalize to a constant
extension predicate.
(@aarch64_ldff1_gather_<ANY_EXTEND:optab><VNx4_WIDE:mode><VNx4_NARROW:mode>)
(@aarch64_ldff1_gather_<ANY_EXTEND:optab><VNx2_WIDE:mode><VNx2_NARROW:mode>)
(*aarch64_ldff1_gather_<ANY_EXTEND:optab><VNx2_WIDE:mode><VNx2_NARROW:mode>_uxtw):
Describe the extension as a predicated rather than unpredicated
extension.
(*aarch64_ldff1_gather_<ANY_EXTEND:optab><VNx2_WIDE:mode><VNx2_NARROW:mode>_sxtw):
Likewise.  Canonicalize to a constant extension predicate.
* config/aarch64/aarch64-sve-builtins-base.cc
(svld1_gather_extend_impl::expand): Add an extra predicate for
the extension.
(svldff1_gather_extend_impl::expand): Likewise.

gcc/testsuite/
* gcc.target/aarch64/sve/gather_load_extend_1.c: New test.
* gcc.target/aarch64/sve/gather_load_extend_2.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_3.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_4.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_5.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_6.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_7.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_8.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_9.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_10.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_11.c: Likewise.
* gcc.target/aarch64/sve/gather_load_extend_12.c: Likewise.

From-SVN: r278346